<!DOCTYPE html>
<html>
<body><!-- This is a comment node! -->

<p>Click the button get info about the body element's child nodes.</p>

<button onclick="myFunction()">Try it</button>

<p><strong>Note:</strong> Whitespace inside elements is considered as text, and text 
is considered as nodes. Comments are also considered as nodes.</p>

<p id="demo"></p>

<script>
function myFunction() {
  var c = document.body.childNodes;
  var txt = "";
  var i;

  for (i = 0; i < c.length; i++) {
    txt = txt + c[i].nodeName + "<br>";
  }

  document.getElementById("demo").innerHTML = txt;
}
</script>

</body>
</html>
